CN114363858A - Conversation and registration method, system and related components of cellular internet of vehicles cooperative communication - Google Patents

Abstract

The application discloses a conversation, a registration method, a system and related components of cellular Internet of vehicles cooperative communication, which are applied to a key control center, wherein the registration method comprises the following steps: initializing system configuration; generating a system master key; acquiring a unique identity of each participatable object; determining a hash function mapping value of each identity mark according to hash function mapping; and calculating by taking the mapping value of each hash function as a base number and the system master key as an index to obtain a private key corresponding to each participatable object, and sending the private key to the corresponding participatable object through a secure channel, so that the participatable object determines a session key by using a multi-linear mapping function family and establishes an encrypted communication channel by using the session key. According to the method and the device, the session key is rapidly calculated and determined based on the characteristics of the multi-linear mapping function family, so that session participants are allowed to be rapidly updated, the adaptability of cooperative communication is high, and the high requirements of the cellular Internet of vehicles on flexibility, timeliness and usability can be met.

Description

Session and registration method, system and related components for cellular vehicle networking collaborative communication

technical field

The invention relates to the field of cellular vehicle networking, in particular to a session and registration method, system and related components for cellular vehicle networking collaborative communication.

Background technique

At present, all participants in Cellular Based V2X (C-V2X) cooperate to realize information sharing and application services through instant messaging, and jointly build C-V2X-based smart transportation and smart cities. At the same time, all participants urgently need to protect their privacy and data security, so collaborative communication needs to ensure channel security, content security and data security.

Encrypting communication data is a direct method to realize multi-party cooperative and secure communication, and key negotiation is an effective technique for constructing encrypted communication channels. Different from the traditional session key negotiation with periodicity, C-V2X key negotiation needs to meet the characteristics of fast and random movement of vehicles. Collaborative secure communication requires fast update speed of session keys and high frequency of interactive communication and computation. Further, in order to provide diversified and high-precision intelligent services in C-V2X, the more participating entities are required to provide data, the better, while the identities and number of entities that actually participate in collaborative communication for key negotiation are not fixed. The method is no longer applicable, and the new scenario requires the key agreement algorithm and its parameters to have the characteristics of dynamic adaptive interconnection networking. Therefore, the traditional session key negotiation has problems such as limited number of participating entities, poor adaptability of the interconnection network, slow authentication calculation speed, and untimely key dynamic update speed, etc., and cannot be applied to the flexibility of C-V2X. , Application scenarios with extremely high requirements on immediacy and availability, and frequent communication between identity authentication and key agreement mechanisms.

Therefore, how to provide a solution to the above technical problem is a problem that those skilled in the art need to solve at present.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide a session and registration method, system and related components for cellular vehicle networking collaborative communication. Its specific plan is as follows:

A registration method for cellular vehicle networking collaborative communication, applied to a key control center, comprising:

Initializing the system configuration; the system configuration includes: a cyclic group determined according to each participating object, based on the generator of each cyclic group; mapping to the hash function mapping of each cyclic group, with all the cyclic groups The generator of the actual participating object in the participating objects is a multi-linear mapping function family of preimage input;

Generate system master key;

Get the unique ID of each participant;

According to the hash function mapping, determine the hash function mapping value of each of the identity identifiers;

Taking each of the hash function mapping values as the base and the system master key as the exponent to obtain the private key corresponding to each of the participating objects, and sending it to the corresponding participating objects through a secure channel, So that the participant can send out a temporary public key when participating in a session, and use the multilinear mapping function family to determine the session key according to its own private key and the temporary public key of all other actually participating objects. An encrypted communication channel is established using the session key.

Preferably, the participating objects include: one or more intelligent connected vehicles, and/or one or more roadside units, and/or one or more cloud servers.

Preferably, the multilinear mapping function family has the following characteristics:

e _k (g,…,ga ,…,g) ⁼ e _k (g,…,g,…,g) ^a , where e _k is the family of multilinear mapping functions, and g is the multilinear mapping function Arbitrary preimage input of the family, a is a positive integer;

non-degenerate;

satisfy the commutative law.

Correspondingly, the present application also discloses a conversation method for cellular vehicle networking collaborative communication, which is applied to any actual participant in the current conversation, including:

Receive the private key sent by the key control center in the registration method for the cellular vehicle networking collaborative communication described in any one of the above;

Generate a temporary public key and broadcast;

Receive temporary public keys of other said actual participating objects;

According to its own private key and the temporary public keys of all other actual participating objects, use the multi-linear mapping function family to determine the session key;

An encrypted communication channel is established using the session key.

Preferably, the process of generating and broadcasting the temporary public key includes:

Generate a temporary value that is secretly stored in itself;

The temporary public key is obtained by calculating with its own hash function mapping value as the base and the temporary value as the exponent and broadcast.

Preferably, after establishing an encrypted communication channel by using the session key, the method further includes:

After the session ends, the temporary public key is destroyed.

Preferably, after establishing an encrypted communication channel by using the session key, the method further includes:

Update the temporary public keys of other said actual participating objects;

The session key is updated according to the updated temporary public key using a family of multi-linear mapping functions.

Correspondingly, the present application also discloses a registration system for cellular vehicle networking collaborative communication, which is applied to a key control center, including:

an initialization module for initializing a system configuration; the system configuration includes: a cyclic group determined according to each participating object, based on a generator of each cyclic group; mapping to a hash function mapping of each cyclic group , take the described generator of the actual participating objects in all the participating objects as the multi-linear mapping function family of the pre-image input;

The key generation module is used to generate the system master key;

The receiving module is used to obtain the unique identity of each participating object;

a first calculation module, configured to determine the hash function mapping value of each of the identity identifiers according to the hash function mapping;

The second calculation module is configured to calculate the private key corresponding to each of the participating objects by taking the mapping value of each hash function as the base and the system master key as the exponent, and send it to the corresponding private key through a secure channel. so that the participant can send out a temporary public key when participating in a session, and use the multi-linear mapping according to its own private key and the temporary public key of all other actually participating objects The family of functions determines a session key and uses the session key to establish an encrypted communication channel.

Correspondingly, the present application also discloses a cellular vehicle networking collaborative communication device, comprising:

memory for storing computer programs;

The processor is configured to implement the steps of the registration method for the cooperative communication of the cellular Internet of Vehicles described in any one of the above or the session method for the cooperative communication of the cellular Internet of Vehicles according to any one of the above when the computer program is executed.

Correspondingly, the present application also discloses a readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the cellular vehicle networking collaborative communication as described in any of the above is realized. The steps of the registration method or the session method of the cellular vehicle networking collaborative communication described in any of the above.

The present application discloses a registration method for cellular vehicle networking collaborative communication, which is applied to a key control center, including: initializing system configuration; generating a system master key; obtaining the unique identity of each participating object; , determine the hash function mapping value of each identity identifier; take each hash function mapping value as the base and the system master key as the exponent to obtain the private key corresponding to each participating object, and send it to the corresponding The participants can use the multi-linear mapping function family to determine the session key and use the session key to establish an encrypted communication channel. This application distributes private keys based on hash function mapping and multi-linear mapping function family, and further uses the private key to determine the session key. The characteristics of the multi-linear mapping function family enable fast calculation and determination of session keys, thereby allowing session participants to quickly update and collaborate The communication is highly adaptive and can meet the high requirements of the cellular vehicle networking for flexibility, timeliness and availability.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative work.

FIG. 1 is a flowchart showing the steps of a registration method for cellular vehicle networking collaborative communication in an embodiment of the present invention;

2 is a structural distribution diagram of a session method for cellular vehicle networking collaborative communication in an embodiment of the present invention;

FIG. 3 is a structural distribution diagram of a registration system for cellular vehicle networking collaborative communication according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The traditional session key negotiation has problems such as limited number of participating entities, poor adaptability of interconnection networking, slow authentication calculation speed, and untimely key dynamic update speed. Application scenarios with extremely high requirements on performance and availability, and frequent interactions between identity authentication and key agreement mechanisms.

This application distributes private keys based on hash function mapping and multi-linear mapping function family, and further uses the private key to determine the session key. The characteristics of the multi-linear mapping function family enable fast calculation and determination of session keys, thereby allowing session participants to quickly update and collaborate The communication is highly adaptive and can meet the high requirements of the cellular vehicle networking for flexibility, timeliness and availability.

An embodiment of the present invention discloses a registration method for cellular vehicle networking collaborative communication, which is applied to a key control center, as shown in FIG. 1 , including:

S01: Initialize system configuration;

Among them, the system configuration includes: a cyclic group determined according to each participating object, based on the generator of each cyclic group; mapping to the hash function mapping of each cyclic group, generating the actual participating objects in all the participating objects A family of multilinear mapping functions whose element is the preimage input. Specifically, the generator of the i-th cyclic group G _i is g _i , that is, G _i =<g _i >, where i is a positive integer, let G ₁ =G, g ₁ =g; further, the hash function The mapping can be expressed as H:{0,1} ^* àG, which maps any string to the element of the cyclic group G and satisfies the basic property requirements of the hash function; the multilinear mapping function family can be expressed as e _k :G*G*… *GàG _k , where k is a positive integer not less than 2, indicating the number of participants in the actual session negotiation. The multi-linear mapping function family _ek takes the elements in the k cyclic groups G as the pre-image input, and in this implementation In this example, the family of multilinear mapping functions needs to satisfy the following properties:

e _k (g,…,ga ,…,g) ⁼ e _k (g,…,g,…,g) ^a , where e _k is the family of multilinear mapping functions, and g is the multilinear mapping function Arbitrary preimage input of the family, a is a positive integer;

Non-degenerate, that is, when g is the generator of G, e _k (g,...,g,...,g) is the generator of G _k ;

The commutative law is satisfied, that is, k preimage inputs can exchange positions arbitrarily.

Specifically, the construction method of the multi-linear mapping function family in this embodiment includes, but is not limited to, discrete logarithm, elliptic curve and other forms.

S02: Generate system master key;

Specifically, the key of the key control center is the system master key, which is generally generated by cloud computing or server settings. The system master key can be recorded as MSK=s. Correspondingly, at this time, the system public key is PK=g ^s , the public key of the system is public, which can be queried through the bulletin board or broadcast through the public channel, while the master key of the system is kept secretly by the key control center.

S03: Obtain the unique identity of each participant;

Specifically, the unique identifier is initialized and generated by each participating object, which can be recorded as ID_i, where i is a positive integer. The unique identifier can be published as the public key of the corresponding participating object, and the key control center receives the The unique identification is equivalent to registering in the communication system of the cellular vehicle networking collaborative communication.

S04: According to the hash function mapping, determine the hash function mapping value of each identity identifier;

Specifically, the hash function mapping value corresponding to each identity identifier ID_i is denoted as g _{ID_i} =H(ID_i), i=1,2,...;

S05: Calculate the private key corresponding to each participating object by taking the mapping value of each hash function as the base and the system master key as the exponent, and send it to the corresponding participating object through a secure channel, so that the participating object can be When participating in a session, a temporary public key is sent out, the session key is determined according to its own private key and the temporary public key of all other actually participating objects, and an encrypted communication channel is established by using the multi-linear mapping function family.

It can be understood that, in the communication system of the cellular vehicle networking collaborative communication, the participating objects include: one or more intelligent connected vehicles, and/or one or more roadside units, and/or one or more cloud servers . Among them, the number of connected vehicles, roadside units, and cloud servers can be set according to the actual session requirements. The participants who can participate in the session are the actual participants, and there must be two or more participants each time they participate in the session. For example, one connected car and one roadside unit, or three connected cars, two roadside units and one cloud server.

Specifically, the private key of each participant can be expressed as SK _{ID_i} = ^g _{ID_is} , and is sent to the corresponding participant by using a non-public secure channel. If the participant participates in the session, the private key and other participants can be used. Numerical value to generate the session key.

Specifically, any actual participating object can use its own private key and the temporary public key of all other actual participating objects as the pre-image input, and use the multi-linear mapping function family to determine the session key by itself. Suppose that in a session, there are k total The actual participating object, the session key of the i-th actual participating object can be expressed as:

K_i=e _k (g _{ID_1} ^r_1 ,…, g _{ID_(i-1)} ^r_(i-1) , SK _{ID_i} , g _{ID_(i+1)} ^r_(i+1) ,…, g _{ID_k} ^r_k ) ^r_i ,

g _{ID_1} ^r_1 is the temporary public key sent out by the first actual participating object, which can be expressed in the form of its hash function mapping value as the base and r_1 as the exponent, r_1 can be a temporarily generated value, so as to calculate the temporary The public key can also directly generate a temporary public key whose value can be expressed as above, and r_1 is not a necessary value. Temporary public keys of other actual participating objects and so on.

According to the characteristics of the multilinear mapping function family above, the following inferences can be obtained:

K_i=e _k (g _{ID_1} ^r_1 ,…, g _{ID_(i-1)} ^r_(i-1) , SK _{ID_i} , g _{ID_(i+1)} ^r_(i+1) ,…, g _{ID_k} ^r_k ) ^r_i

= e _k (g _{ID_1} ,…, g _{ID_(i-1)} , g _{ID_i} , g _{ID_(i+1)} ,…, g _{ID_k} ) ^{r_1*…*r_k*s}

Therefore, K_1=K_2=…=K_k, that is, the session keys generated by all the actual participating objects are consistent, so that a secure encrypted communication channel based on the symmetric cryptographic algorithm can be constructed.

The embodiment of the present application discloses a registration method for cellular vehicle networking collaborative communication, which is applied to a key control center, including: initializing a system configuration; generating a system master key; obtaining the unique identity of each participating object; Function mapping, determine the hash function mapping value of each identity; calculate with the base of each hash function and the system master key as the exponent to obtain the private key corresponding to each participating object, and send it through a secure channel To the corresponding participant object, so that the participant object can use the multi-linear mapping function family to determine the session key, and use the session key to establish an encrypted communication channel. This embodiment distributes the private key based on the hash function mapping and the multi-linear mapping function family, and further uses the private key to determine the session key. The characteristics of the multi-linear mapping function family enable the session key to be quickly calculated and determined, thereby allowing the session participants to update quickly. Collaborative communication has high adaptability and can meet the high requirements of cellular vehicle networking for flexibility, timeliness and availability.

Correspondingly, the present application also discloses a session method for cellular vehicle networking collaborative communication, which is applied to any actual participant in the current session. Referring to FIG. 2 , the method includes:

S11: Receive the private key sent by the key control center in any of the above registration methods for cellular vehicle networking collaborative communication;

S12: Generate a temporary public key and broadcast;

Further, the process of generating and broadcasting the temporary public key in step S12 may include:

Generate a temporary value that is secretly stored in itself;

Calculate the temporary public key with its own hash function mapping value as the base and the temporary value as the exponent and broadcast it.

For the i-th actual participating object, its temporary value is r_i, and its temporary public key is g _{ID_i} ^r_i . In addition to this method of generating a temporary value and then calculating the temporary public key, it is also possible to skip the step of generating a temporary value and generate it directly. A temporary public key, as long as it is guaranteed that the temporary public key satisfies the form that can be expressed as an exponential power, which ensures that the session keys of all actually participating objects are consistent.

S13: Receive the temporary public key of other actual participating objects;

S14: According to its own private key and the temporary public keys of all other actual participating objects, use the multi-linear mapping function family to determine the session key;

Specifically, assuming that there are k actual participating objects in a session, the session key of the i-th actual participating object can be expressed as:

K_i=e _k (g _{ID_1} ^r_1 ,…, g _{ID_(i-1)} ^r_(i-1) , SK _{ID_i} , g _{ID_(i+1)} ^r_(i+1) ,…, g _{ID_k} ^r_k ) ^r_i .

Due to the characteristics of the multilinear mapping function family, it can be obtained:

K_i=e _k (g _{ID_1} ^r_1 ,…, g _{ID_(i-1)} ^r_(i-1) , SK _{ID_i} , g _{ID_(i+1)} ^r_(i+1) ,…, g _{ID_k} ^r_k ) ^r_i

= e _k (g _{ID_1} ,…, g _{ID_(i-1)} , g _{ID_i} , g _{ID_(i+1)} ,…, g _{ID_k} ) ^{r_1*…*r_k*s}

Therefore, K_1=K_2=…=K_k, that is, the session keys generated by all the actual participating objects are consistent, so that a secure encrypted communication channel based on the symmetric cryptographic algorithm can be constructed.

S15: Establish an encrypted communication channel using the session key.

Further, after the encrypted communication channel is established by using the session key, the method further includes:

After the session ends, destroy the temporary public key.

Further, after the encrypted communication channel is established by using the session key, the method further includes:

Update the temporary public keys of other actual participating objects;

Using a family of multilinear mapping functions, the session key is updated according to the updated ephemeral public key.

It can be understood that due to the characteristics of the multi-linear mapping function family, if other actual participating objects in the current session change, it is not necessary to recalculate the session key completely. The temporary public key of the object updates the session key. Taking the addition of n actual participating objects in the current session as an example, the new session key of the current actual participating objects is: K'_k=e _k+n (K_k,… ,g _{ID_(n-1)} ,g _{ID_n} ), and K'_1=K'2=…=K'_k=…=K'_k+n,

Where K'_k is the updated session key, and K_k is the original session key when it is not updated.

There is no need for re-interaction, authentication and repeated calculation when updating, which greatly reduces resources and time-consuming.

This Embodiment In the above-mentioned embodiment, the private key control center further uses the private key to determine the session key according to the private key distributed by the hash function mapping and the multi-linear mapping function family. The characteristics of the multi-linear mapping function family enable the fast calculation of the session key This allows the participants in the session to update quickly, and the adaptive communication of collaborative communication is high, which can meet the high requirements of the cellular vehicle networking for flexibility, timeliness and availability.

Correspondingly, the present application also discloses a registration system for cellular vehicle networking collaborative communication, which is applied to a key control center, as shown in FIG. 3 , including:

An initialization module 1 is used to initialize a system configuration; the system configuration includes: a cyclic group determined according to each participating object, based on a generator of each cyclic group; a hash function mapped to each cyclic group Mapping, a multi-linear mapping function family that takes the generators of the actual participating objects in all the participating objects as the pre-image input;

The key generation module 2 is used to generate the system master key;

The receiving module 3 is used to obtain the unique identification of each participating object;

The first calculation module 4 is used to determine the hash function mapping value of each of the identity identifiers according to the hash function mapping;

The second calculation module 5 is configured to calculate the private key corresponding to each of the participating objects by taking the mapping value of each hash function as the base and the system master key as the exponent, and sending it to the Corresponding to the participating objects, so that the participating objects can send out a temporary public key when participating in a session, and use the multi-linear The family of mapping functions determines a session key and uses the session key to establish an encrypted communication channel.

In some specific embodiments, the participating objects include: one or more intelligent connected vehicles, and/or one or more roadside units, and/or one or more cloud servers.

In some specific embodiments, the family of multilinear mapping functions has the following properties:

e _k (g,…,ga ,…,g) ⁼ e _k (g,…,g,…,g) ^a , where e _k is the family of multi-linear mapping functions, and g is the multi-linear mapping function Arbitrary preimage input of the family, a is a positive integer;

non-degenerate;

satisfy the commutative law.

This embodiment distributes the private key based on the hash function mapping and the multi-linear mapping function family, and further uses the private key to determine the session key. The characteristics of the multi-linear mapping function family enable the session key to be quickly calculated and determined, thereby allowing the session participants to update quickly. Collaborative communication has high adaptability and can meet the high requirements of cellular vehicle networking for flexibility, timeliness and availability.

Correspondingly, the present application also discloses a cellular vehicle networking collaborative communication device, comprising:

memory for storing computer programs;

The processor is configured to implement the steps of the registration method for the cooperative communication of the cellular Internet of Vehicles described in any one of the above or the session method for the cooperative communication of the cellular Internet of Vehicles according to any one of the above when the computer program is executed.

Correspondingly, the present application also discloses a readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the cellular vehicle networking collaborative communication as described in any of the above is realized. The steps of the registration method or the session method of the cellular vehicle networking collaborative communication described in any of the above.

For details about the registration method for the cellular vehicle networking collaborative communication or the session method for the cellular vehicle networking collaborative communication, reference may be made to the relevant descriptions in the above embodiments, which will not be repeated here.

Wherein the cellular vehicle networking collaborative communication device and the readable storage medium in this embodiment have the same technical effects as the cellular vehicle networking collaborative communication registration method or the cellular vehicle networking collaborative communication session method described in the above embodiment, It will not be repeated here.

Finally, it should also be noted that in this document, relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply these entities or that there is any such actual relationship or sequence between operations. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

The session and registration method, system and related components of a cellular vehicle networking collaborative communication provided by the present invention have been described above in detail. In this paper, specific examples are used to illustrate the principles and implementations of the present invention. The description is only used to help understand the method of the present invention and its core idea; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. , the contents of this specification should not be construed as limiting the invention.

Claims (10)

1. a registration method for cellular vehicle networking collaborative communication, is characterized in that, is applied to key control center, comprises: Initializing the system configuration; the system configuration includes: a cyclic group determined according to each participating object, based on the generator of each cyclic group; mapping to the hash function mapping of each cyclic group, with all the cyclic groups The generator of the actual participating object in the participating objects is a multi-linear mapping function family of preimage input; Generate system master key; Get the unique ID of each participant; According to the hash function mapping, determine the hash function mapping value of each of the identity identifiers; Taking each of the hash function mapping values as the base and the system master key as the exponent to obtain the private key corresponding to each of the participating objects, and sending it to the corresponding participating objects through a secure channel, So that the participant can send out a temporary public key when participating in a session, and use the multilinear mapping function family to determine the session key according to its own private key and the temporary public key of all other actually participating objects. An encrypted communication channel is established using the session key. 2. The registration method according to claim 1, characterized in that, the participating objects include: one or more intelligent connected vehicles, and/or, one or more roadside units, and/or, one or more cloud server. 3. The registration method according to claim 1, wherein the multi-linear mapping function family has the following characteristics: e _k (g,…,ga ,…,g) ⁼ e _k (g,…,g,…,g) ^a , where e _k is the family of multilinear mapping functions, and g is the multilinear mapping function Arbitrary preimage input of the family, a is a positive integer; non-degenerate; satisfy the commutative law. 4. A session method for cellular vehicle networking collaborative communication, characterized in that it is applied to any actual participating object of the current session, comprising: Receive the private key sent by the key control center in the registration method of the cellular vehicle networking collaborative communication described in any one of claims 1 to 3; Generate a temporary public key and broadcast; Receive temporary public keys of other said actual participating objects; According to its own private key and the temporary public keys of all other actual participating objects, use the multi-linear mapping function family to determine the session key; An encrypted communication channel is established using the session key. 5. The session method according to claim 4, wherein the process of generating and broadcasting a temporary public key comprises: Generate a temporary value that is secretly stored in itself; The temporary public key is obtained by calculating with its own hash function mapping value as the base and the temporary value as the exponent and broadcast. 6. The session method according to claim 4, wherein after establishing an encrypted communication channel by using the session key, the method further comprises: After the session ends, the temporary public key is destroyed. 7. The session method according to claim 4, wherein after establishing an encrypted communication channel by using the session key, the method further comprises: Update the temporary public keys of other said actual participating objects; The session key is updated according to the updated temporary public key using a family of multi-linear mapping functions. 8. A registration system for cellular vehicle networking collaborative communication, characterized in that, applied to a key control center, comprising: an initialization module for initializing a system configuration; the system configuration includes: a cyclic group determined according to each participating object, and a generator based on each of the cyclic groups; mapping to a hash function mapping of each of the cyclic groups , take the described generator of the actual participating objects in all the participating objects as the multi-linear mapping function family of the pre-image input; The key generation module is used to generate the system master key; The receiving module is used to obtain the unique identity of each participating object; a first calculation module, configured to determine the hash function mapping value of each of the identity identifiers according to the hash function mapping; The second calculation module is configured to calculate the private key corresponding to each of the participating objects by taking the mapping value of each hash function as the base and the system master key as the exponent, and send it to the corresponding private key through a secure channel. so that the participant can send out a temporary public key when participating in a session, and use the multi-linear mapping according to its own private key and the temporary public key of all other actually participating objects The family of functions determines a session key and uses the session key to establish an encrypted communication channel. 9. A cellular vehicle networking collaborative communication device, comprising: memory for storing computer programs; A processor for implementing the steps of implementing the registration method of the cellular vehicle networking collaborative communication according to any one of claims 1 to 3 or the session method of the cellular vehicle networking collaborative communication according to any one of claims 1 to 7 when executing the computer program . 10. A readable storage medium, characterized in that, a computer program is stored on the readable storage medium, and when the computer program is executed by a processor, the cellular vehicle networking collaboration according to any one of claims 1 to 3 is realized. The steps of the communication registration method or the session method of the cellular vehicle networking collaborative communication described in any one of 4 to 7.

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